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Facile Synthesis of Flock‐Like V 2 O 3 /C with Improved Electrochemical Performance as an Anode Material for Li‐Ion Batteries
Author(s) -
Meng Leichao,
Guo Ruisong,
Li Fuyun,
Ma Yuanliang,
Peng Jianhong,
Li Tingting,
Luo Yani,
Li Youzhen,
Sun Xiaohong
Publication year - 2020
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201900986
Subject(s) - anode , materials science , electrochemistry , current density , annealing (glass) , lithium (medication) , chemical engineering , porosity , electrode , composite material , chemistry , medicine , physics , quantum mechanics , engineering , endocrinology
V 2 O 3 is considered to be a potential anode material due to its large specific capacity and rich resources. Herein, flock‐like V 2 O 3 coated with carbon is prepared through a facile and simple solvothermal method followed by annealing at a relatively low temperature. The structure of V 2 O 3 /C is composed of porous strips. Due to the unique morphology and structure, the V 2 O 3 /C anode material shows excellent electrochemical performance. It delivers a specific discharge capacity of 696 mAh g −1 after 100 cycles, which is 95% of the specific discharge capacity (732 mAh g −1 ) after the sixth cycle. The V 2 O 3 /C anode material annealed at 360 °C (V 2 O 3 /C‐360) delivers 601 mAh g −1 at a current density of 300 mA g −1 after 500 cycles. It implies superior cyclic stability of V 2 O 3 /C‐360. In addition, the anode also shows excellent rate capability. Specific capacities of approximately 600, 420, and 300 mAh g −1 are obtained at the current densities of 0.3, 2, and 5 A g −1 , respectively. The large current contribution of the capacitive reveals favorable superior lithium storage kinetics. This anode material presents great application potential in high‐performance lithium‐ion batteries.